Breathlessness in humans activates insular cortex. what does this mean?

You read a paper: http://www.ncbi.nlm.nih.gov/pubmed/10923655 some people were put in a color pet scanner and were made to hold their breath. The signal from the insular cortex changed, as it does from other uncomfortable things. The results were published in an obscure journal. This is not cutting-edge science or surprising, though i'm glad someone does studies like this.